component
SN74CBTLV3251PWR
Public Made by Adomby adom
Texas Instruments Logic ICs, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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"mpn": "SN74CBTLV3251PWR",
"manufacturer": "Texas Instruments",
"package": "TSSOP-16",
"pin_count": 16,
"category": "Logic ICs",
"subcategory": "Logic ICs",
"datasheet": "https://www.ti.com/lit/ds/symlink/sn74cbtlv3251.pdf",
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"digikey": "296-9129-2-ND",
"mouser": "595-SN74CBTLV3251PWR"
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"pins": [
{
"number": "1",
"name": "B4",
"type": "bidirectional",
"description": "Switch I/O channel 4 of the 1-of-8 mux, connected to the A port when OE is low, S2 is low, S1 is high and S0 is high (Table 7-1)."
},
{
"number": "2",
"name": "B3",
"type": "bidirectional",
"description": "Switch I/O channel 3 of the 1-of-8 mux, connected to the A port when OE is low, S2 is low, S1 is high and S0 is low (Table 7-1)."
},
{
"number": "3",
"name": "B2",
"type": "bidirectional",
"description": "Switch I/O channel 2 of the 1-of-8 mux, connected to the A port when OE is low, S2 is low, S1 is low and S0 is high (Table 7-1)."
},
{
"number": "4",
"name": "B1",
"type": "bidirectional",
"description": "Switch I/O channel 1 of the 1-of-8 mux, connected to the A port when OE is low, S2 is low, S1 is low and S0 is low (Table 7-1)."
},
{
"number": "5",
"name": "A",
"type": "bidirectional",
"description": "Common mux port that connects to the selected B channel when OE is low; the datasheet lists it as Output/Input of mux (Table 4-1)."
},
{
"number": "6",
"name": "NC",
"type": "unconnected",
"description": "No internal connection."
},
{
"number": "7",
"name": "OE",
"type": "input",
"description": "Active-low output enable: when high, the FET multiplexer/demultiplexer is disabled, and OE must be tied to VCC through a pullup resistor to ensure high-impedance during power up or power down (Section 7.1)."
},
{
"number": "8",
"name": "GND",
"type": "power_in",
"description": "Ground reference."
},
{
"number": "9",
"name": "S2",
"type": "input",
"description": "Select input bit 2 for channel selection; at VCC 2.7 V to 3.6 V the high-level input is at least 2 V and the low-level input is at most 0.8 V (Section 5.3)."
},
{
"number": "10",
"name": "S1",
"type": "input",
"description": "Select input bit 1 for channel selection; at VCC 2.7 V to 3.6 V the high-level input is at least 2 V and the low-level input is at most 0.8 V (Section 5.3)."
},
{
"number": "11",
"name": "S0",
"type": "input",
"description": "Select input bit 0 for channel selection; at VCC 2.7 V to 3.6 V the high-level input is at least 2 V and the low-level input is at most 0.8 V (Section 5.3)."
},
{
"number": "12",
"name": "B8",
"type": "bidirectional",
"description": "Switch I/O channel 8 of the 1-of-8 mux, connected to the A port when OE is low, S2 is high, S1 is high and S0 is high (Table 7-1)."
},
{
"number": "13",
"name": "B7",
"type": "bidirectional",
"description": "Switch I/O channel 7 of the 1-of-8 mux, connected to the A port when OE is low, S2 is high, S1 is high and S0 is low (Table 7-1)."
},
{
"number": "14",
"name": "B6",
"type": "bidirectional",
"description": "Switch I/O channel 6 of the 1-of-8 mux, connected to the A port when OE is low, S2 is high, S1 is low and S0 is high (Table 7-1)."
},
{
"number": "15",
"name": "B5",
"type": "bidirectional",
"description": "Switch I/O channel 5 of the 1-of-8 mux, connected to the A port when OE is low, S2 is high, S1 is low and S0 is low (Table 7-1)."
},
{
"number": "16",
"name": "VCC",
"type": "power_in",
"description": "Supply voltage, recommended range 2.3 V to 3.6 V (absolute maximum 4.6 V); place a bypass capacitor as close to the pin as possible (Sections 5.1, 5.3, 8.2)."
}
],
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"primary_model": "claude-haiku-5-5",
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"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: Datasheet Table 4-1 types pin A as 'O/I' (output/input). Mapped to KiCad bidirectional because it is; Pin 6 is listed as 'No internal connection' in Table 4-1 and Figure 4-1; mapped to unconnected.; Datasheet types these as I/O (input or output of mux). Mapped to bidirectional for an analog-style F"
],
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"at": "2026-10-18T04:43:09"
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